Gumbasia reminded me of old films like the ones I saw at the
Exploratorium, so I went digging. I found
Norman McLaren's Synchromy, which is
still excellent though on my computer it was slightly... out of
sync. Oskar Fischinger's Composition in Blue I could not find,
but there is another
film of his, seemingly a commercial that anthropomorphizes
cigarettes. It's fun except it was made in 1934 and you're all the
time worried it's going to turn into a cigarette Nuremberg
rally. Which is totally unfair because Oskar Fischinger's art was
degenerate and unwelcome, and he left Germany for Hollywood in 1936, so why am I thinking that?

There's also Norman McLaren's Neighbors, which
some crackpot Wired article claimed was one of the inspirations for
Star Wars. Why, because there's a swordfight? (Note: I don't
feel like finding the reference because the Wired article might
actually have a point, and then where would I be?)